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3 GB barrier

Index 3 GB barrier

In computing, the term 3 GB barrier refers to a limitation of some 32-bit operating systems running on x86 microprocessors. [1]

47 relations: Accelerated Graphics Port, Advanced Micro Devices, AMD K8, BIOS, Chipset, Computing, Conventional PCI, Device driver, Intel 80386, Linux, Linux kernel, MacBook, MacOS, Memory-mapped I/O, Microprocessor, Microsoft, Microsoft Windows, Motherboard, NX bit, Operating system, PCI Express, PCI hole, Pentium Pro, Physical address, Physical Address Extension, Protected mode, Protection ring, PSE-36, RAM drive, Random-access memory, Software license, User space, Video RAM (dual-ported DRAM), Virtual memory, Windows 10, Windows 7, Windows 8, Windows 8.1, Windows Server, Windows Vista, Windows XP, Workaround, X86, X86-64, 32-bit, 36-bit, 64-bit computing.

Accelerated Graphics Port

The Accelerated Graphics Port (AGP) was designed as a high-speed point-to-point channel for attaching a video card to a computer system, primarily to assist in the acceleration of 3D computer graphics.

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Advanced Micro Devices

Advanced Micro Devices, Inc. (AMD) is an American multinational semiconductor company based in Santa Clara, California, that develops computer processors and related technologies for business and consumer markets.

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AMD K8

The AMD K8 Hammer, also code-named SledgeHammer, is a computer processor microarchitecture designed by AMD as the successor to the AMD K7 Athlon microarchitecture.

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BIOS

BIOS (an acronym for Basic Input/Output System and also known as the System BIOS, ROM BIOS or PC BIOS) is non-volatile firmware used to perform hardware initialization during the booting process (power-on startup), and to provide runtime services for operating systems and programs.

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Chipset

In a computer system, a chipset is a set of electronic components in an integrated circuit known as a "Data Flow Management System" that manages the data flow between the processor, memory and peripherals.

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Computing

Computing is any goal-oriented activity requiring, benefiting from, or creating computers.

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Conventional PCI

Conventional PCI, often shortened to PCI, is a local computer bus for attaching hardware devices in a computer.

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Device driver

In computing, a device driver is a computer program that operates or controls a particular type of device that is attached to a computer.

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Intel 80386

The Intel 80386, also known as i386 or just 386, is a 32-bit microprocessor introduced in 1985.

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Linux

Linux is a family of free and open-source software operating systems built around the Linux kernel.

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Linux kernel

The Linux kernel is an open-source monolithic Unix-like computer operating system kernel.

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MacBook

The MacBook is a brand of notebook computers manufactured by Apple Inc. from May 2006 to February 2012, and relaunched in 2015.

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MacOS

macOS (previously and later) is a series of graphical operating systems developed and marketed by Apple Inc. since 2001.

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Memory-mapped I/O

Memory-mapped I/O (MMIO) and port-mapped I/O (PMIO) (which is also called isolated I/O) are two complementary methods of performing input/output (I/O) between the central processing unit (CPU) and peripheral devices in a computer.

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Microprocessor

A microprocessor is a computer processor that incorporates the functions of a central processing unit on a single integrated circuit (IC), or at most a few integrated circuits.

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Microsoft

Microsoft Corporation (abbreviated as MS) is an American multinational technology company with headquarters in Redmond, Washington.

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Microsoft Windows

Microsoft Windows is a group of several graphical operating system families, all of which are developed, marketed, and sold by Microsoft.

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Motherboard

A motherboard (sometimes alternatively known as the mainboard, system board, baseboard, planar board or logic board, or colloquially, a mobo) is the main printed circuit board (PCB) found in general purpose microcomputers and other expandable systems.

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NX bit

The NX bit (no-execute) is a technology used in CPUs to segregate areas of memory for use by either storage of processor instructions (code) or for storage of data, a feature normally only found in Harvard architecture processors.

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Operating system

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs.

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PCI Express

PCI Express (Peripheral Component Interconnect Express), officially abbreviated as PCIe or PCI-e, is a high-speed serial computer expansion bus standard, designed to replace the older PCI, PCI-X, and AGP bus standards.

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PCI hole

The PCI hole or PCI memory hole is a limitation of 32-bit hardware and 32-bit operating systems that causes a computer to appear to have less memory available than is physically installed.

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Pentium Pro

The Pentium Pro is a sixth-generation x86 microprocessor developed and manufactured by Intel introduced in November 1, 1995.

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Physical address

In computing, a physical address (also real address, or binary address), is a memory address that is represented in the form of a binary number on the address bus circuitry in order to enable the data bus to access a particular storage cell of main memory, or a register of memory mapped I/O device.

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Physical Address Extension

In computing, Physical Address Extension (PAE), sometimes referred to as Page Address Extension, is a memory management feature for the x86 architecture.

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Protected mode

In computing, protected mode, also called protected virtual address mode, is an operational mode of x86-compatible central processing units (CPUs).

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Protection ring

In computer science, hierarchical protection domains, often called protection rings, are mechanisms to protect data and functionality from faults (by improving fault tolerance) and malicious behaviour (by providing computer security).

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PSE-36

In computing, PSE-36 (36-bit Page Size Extension) refers to a feature of x86 processors that extends the physical memory addressing capabilities from 32 bits to 36 bits, allowing addressing to up to 64 GB of memory.

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RAM drive

A RAM drive (also called a RAM disk) is a block of random-access memory (primary storage or volatile memory) that a computer's software is treating as if the memory were a disk drive (secondary storage).

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Random-access memory

Random-access memory (RAM) is a form of computer data storage that stores data and machine code currently being used.

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Software license

A software license is a legal instrument (usually by way of contract law, with or without printed material) governing the use or redistribution of software.

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User space

A modern computer operating system usually segregates virtual memory into kernel space and user space.

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Video RAM (dual-ported DRAM)

Video RAM, or VRAM, is a dual-ported variant of dynamic RAM (DRAM), which was once commonly used to store the framebuffer in graphics adapters.

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Virtual memory

In computing, virtual memory (also virtual storage) is a memory management technique that provides an "idealized abstraction of the storage resources that are actually available on a given machine" which "creates the illusion to users of a very large (main) memory." The computer's operating system, using a combination of hardware and software, maps memory addresses used by a program, called virtual addresses, into physical addresses in computer memory.

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Windows 10

Windows 10 (codenamed Redstone, formerly Threshold) is a personal computer operating system developed and released by Microsoft, as part of the Windows NT family of operating systems.

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Windows 7

Windows 7 (codenamed Vienna, formerly Blackcomb) is a personal computer operating system developed by Microsoft.

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Windows 8

Windows 8 is a personal computer operating system developed by Microsoft as part of the Windows NT family of operating systems.

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Windows 8.1

Windows 8.1 (codenamed Blue) is a computer operating system released by Microsoft.

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Windows Server

Windows Server is a brand name for a group of server operating systems released by Microsoft.

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Windows Vista

Windows Vista (codenamed Longhorn) is an operating system by Microsoft for use on personal computers, including home and business desktops, laptops, tablet PCs and media center PCs.

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Windows XP

Windows XP (codenamed Whistler) is a personal computer operating system that was produced by Microsoft as part of the Windows NT family of operating systems.

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Workaround

A workaround is a bypass of a recognized problem or limitation in a system.

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X86

x86 is a family of backward-compatible instruction set architectures based on the Intel 8086 CPU and its Intel 8088 variant.

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X86-64

x86-64 (also known as x64, x86_64, AMD64 and Intel 64) is the 64-bit version of the x86 instruction set.

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32-bit

32-bit microcomputers are computers in which 32-bit microprocessors are the norm.

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36-bit

Prior to the introduction of computers, the state of the art in precision scientific and engineering calculation was the ten-digit, electrically powered, mechanical calculator, such as those manufactured by Friden, Marchant and Monroe.

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64-bit computing

In computer architecture, 64-bit computing is the use of processors that have datapath widths, integer size, and memory address widths of 64 bits (eight octets).

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Redirects here:

3 GiB barrier, 3GB barrier.

References

[1] https://en.wikipedia.org/wiki/3_GB_barrier

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